Transcription

2 Warranty and Assistance The GILL INSTRUMENTS WINDSONIC TWO DIMENSIONAL SONIC ANEMOMETER is warranted by CAMPBELL SCIENTIFIC, INC. to be free from defects in materials and workmanship under normal use and service for twelve (12) months from date of shipment unless specified otherwise. Batteries have no warranty. CAMPBELL SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products. The customer shall assume all costs of removing, reinstalling, and shipping defective products to CAMPBELL SCIENTIFIC, INC. CAMPBELL SCIENTIFIC, INC. will return such products by surface carrier prepaid. This warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products which have been subjected to modification, misuse, neglect, accidents of nature, or shipping damage. This warranty is in lieu of all other warranties, expressed or implied, including warranties of merchantability or fitness for a particular purpose. CAMPBELL SCIENTIFIC, INC. is not liable for special, indirect, incidental, or consequential damages. Products may not be returned without prior authorization. The following contact information is for US and International customers residing in countries served by Campbell Scientific, Inc. directly. Affiliate companies handle repairs for customers within their territories. Please visit to determine which Campbell Scientific company serves your country. To obtain a Returned Materials Authorization (RMA), contact CAMPBELL SCIENTIFIC, INC., phone (435) After an applications engineer determines the nature of the problem, an RMA number will be issued. Please write this number clearly on the outside of the shipping container. CAMPBELL SCIENTIFIC's shipping address is: CAMPBELL SCIENTIFIC, INC. RMA# 815 West 1800 North Logan, Utah CAMPBELL SCIENTIFIC, INC. does not accept collect calls.

3 WindSonic Table of Contents PDF viewers note: These page numbers refer to the printed version of this document. Use the Adobe Acrobat bookmarks tab for links to specific sections. 1. General Description Specifications Installation Siting Mounting Wiring RS-232 Wiring SDI-12 Wiring Datalogger Programming for RS-232 Output Single WindSonic1 on a CRBasic Datalogger Four WindSonic1s on a CRBasic Datalogger Datalogger Programming for SDI-12 Output Single WindSonic4 on an EDLOG Datalogger Two WindSonic4s on an EDLOG Datalogger Two WindSonic4s on a CR200-series Datalogger Single WindSonic4 on a CRBasic Datalogger Changing the SDI-12 Address Using LoggerNet and a Datalogger Array-Based EDLOG Dataloggers Table-Based EDLOG Dataloggers CR200-series Datalogger Maintenance Diagnostic Codes Siting References...30 i

4 WindSonic Table of Contents Appendix A. WindSonic Orientation... A-1 A.1 Determining True North and Sensor Orientation... A-1 A.2 Online Magnetic Declination Calculator... A-3 Figures Tables 1. WindSonic Mounted on a CM202 using p/n Screen Capture of the SDI-12 Transparent Mode on an EDLOG Array-Based Datalogger (CR10X) using Control Port 8 and Changing the SDI-12 Address from 0 to Screen Capture of the SDI-12 Transparent Mode on an EDLOG Table-Based Datalogger using Control Port 8 and Changing the SDI-12 Address from 0 to Screen Capture of the SDI-12 Transparent Mode on a CRBasic CR200-series Datalogger using Control Port C1/SDI12 and Changing the SDI-12 Address from 0 to A-1. Magnetic Declination for the Conterminous United States (2004)... A-1 A-2. A Declination Angle East of True North (Positive) is Subtracted from 360 (0) degrees to Find True North... A-2 A-3. A Declination Angle West of True North (Negative) is Subtracted from 0 (360) degrees to Find True North... A-2 A-4. Online Magnetic Declination Calculator with Inputs and Output for Longmont, CO... A-3 1. WindSonic1 to Datalogger Connections WindSonic4 to Datalogger Connections CRBasic Datalogger Operating Systems that Support RS-232 Communications and SerialInRecord () Wiring for Program Example Wiring for Program Example WindSonic Data Format Option Datalogger Operating Systems that Support the SDI-12 aro! Command Wiring for Program Example Wiring for Program Example Wiring for Program Example Wiring for Program Example Wiring for Program Example Gill WindSonic Diagnostic Codes Example Datalogger Program Diagnostic Codes ii

5 Gill Instruments WindSonic Two Dimensional Sonic Anemometer 1. General Description 2. Specifications The WindSonic is an ultrasonic anemometer for measuring wind direction and wind speed. It uses two pairs of orthogonally oriented transducers to sense the horizontal wind. The transducers bounce the ultrasonic signal from a hood, thus minimizing the effects of transducer shadowing and flow distortion. The WindSonic is shipped from Campbell Scientific, Inc. with a user-specified cable to interface it to a Campbell Scientific datalogger, and a cm (13.75 inch) long vertical mount and right angle bracket to mount the WindSonic to a tripod or tower. Detailed information on the Gill WindSonic is available in the manual published by Gill Instruments, Ltd. This manual serves as a guide for interfacing the WindSonic to Campbell Scientific, Inc. dataloggers. The WindSonic is available in two versions. The Option 1 WindSonic (WindSonic1) outputs data using the RS-232 interface. The Option 4 WindSonic (WindSonic4) outputs data using the SDI-12 interface. The WindSonic1 is interfaced to the Campbell Scientific datalogger control/rs-232 ports using RS-232. This interface is supported by the CR800- series, CR1000, or CR3000. A maximum of four WindSonic1 anemometers can be connected to a single CR1000 or CR3000 datalogger, and two to the CR800-series. CR200-series, CR5000, and all EDLOG dataloggers have limited RS-232 support using the control ports. Campbell Scientific, Inc. does not recommend the use of these dataloggers with the WindSonic1. Campbell Scientific, Inc. recommends that the WindSonic4, SDI-12 interface, be used with CR200-series, CR510, CR10X, CR23X, or CR5000 dataloggers. SDI-12 is a three-wire digital interface standard used by processor-based sensors and digital recording devices. The CR800-series, CR1000, and CR3000 also support the SDI-12 interface. Wind Direction Operating Range: 0 to 360 degrees Accuracy: ± 3 degrees Output Resolution: 1 degree Wind Speed Operating Range: 0 to 60 m/s Accuracy: ± 2% of reading Output Resolution: 0.01 m/s 1

6 3. Installation General Specifications Output Signal: RS-232 (Option 1) SDI-12 version 1.3 (Option 4); address factory set to 0 Output Variables: wind direction, wind speed, and diagnostic (Option 1 or 4) or u x, u y, and diagnostic (Option 4) Measurement Frequency: 40 Hz block averaged to a 4 Hz output frequency (Option 1); 40 Hz block averaged to a 1 Hz output frequency (Option 4) Power: 9 to 30 Vdc; 264 mw continuous (Option 1) 9 to 30 Vdc; 211 mw continuous (Option 4) Operating Temperature Range: -35ºC to +70ºC Dimensions: 142 mm diameter (5.6 inches) x 160 mm (6.3 inches) Weight: 500 g (1.1 lb.) Campbell Scientific Factory Default Settings for the WindSonic1 Continuous polar wind (M2) Wind speed in m/s (U1) Field Formatted, comma delineated values (O2) Terminate records with a carriage return and line feed (L1) 4 Hz output frequency (P2) Bauld rate baud (B5) Data bits and parity 8 bits, no parity (F1) No power up message (H2) Sensor address set to Q (NQ) 3.1 Siting 3.2 Mounting Locate the WindSonic away from obstructions, e.g. trees and buildings. As a general rule of thumb, the distance between wind sensors and the nearest obstruction should be ten times the height of the obstruction. If it is necessary to mount the WindSonic on the roof of a building, the height of the sensor, above the roofline, should be at least 1.5 times the height of the building. See Section 10 for a list of references that discuss siting wind direction and speed sensors. The WindSonic is shipped with a mounting kit (p/n 17387). This kit includes a cm (13.75 inch) length of tubing (p/n 17386), three #6-32 x inch pan head screws (p/n 505), and a Right Angle Mounting Kit (CM220). Thread the connector end of the cable through the vertical mount, start at the end without the three threaded holes. Attach the female mating connector on the cable to the male mating connector located on the bottom of the WindSonic. Finally, secure the WindSonic to the vertical mount using the three #6-32 x inch pan head screws (p/n 505). This assembly is attached to either a tripod or tower by a CM202, CM204, CM206, or user-supplied horizontal arm using a CM220 Right Angle Mounting Kit (Figure 1). Orient the WindSonic so that the colored north 2

8 NOTE The maximum cable length that can be used with a RS-232 interface depends on the baud rate, the nominal resistance of the wire, the capacitance between conductors, and the capacitance between the conductors and the shield. According to the Electronic Industries Association RS-232D standard, a rough rule of thumb is to limit RS-232 cable lengths to m (50 feet) or less. Use short haul modems (RAD SRM-5A) between the WindSonic1 and the CRBasic datalogger if they are further than 50 ft apart. Communications between the WindSonic1 and the CRBasic datalogger will most likely fail if the RS-232 cable is extended beyond 50 feet. 4.2 SDI-12 Wiring The WindSonic4 interfaces to a Campbell Scientific datalogger using SDI-12. SDI-12 is a three-wire interface used between processor-based sensors and digital recorders (Table 2). Each SDI-12 sensor has a unique address; up to ten SDI-12 sensors can be addressed by a single datalogger SDI-12 input or control port. At a 1 Hz measurement rate, a maximum of 4 WindSonics (Option 4) can be measured by a datalogger. The factory-set address for the WindSonic is 0. To change the SDI-12 address, see Section 7. TABLE 2. WindSonic4 to Datalogger Connections Description Color Datalogger SDI-12 data Green SDI-12 Input or Control Port SDI-12 power Red 12 Vdc SDI-12 reference Black G Shield Clear G NOTE The SDI-12 standard specifies a maximum cable length of 61 meters (200 feet). Communications between the WindSonic4 and datalogger will fail if the SDI-12 cable is extended beyond this limit. 5. Datalogger Programming for RS-232 Output The WindSonic1 updates the RS-232 output at a frequency of 4 Hz. The CRBasic dataloggers (CR800-series, CR1000, and CR3000) use the SerialInRecord () instruction to poll the serial port at the scan interval. This ensures that the most current wind data is available for use by the program. 4

9 The datalogger and WindSonic each run from their own internal clocks. These clocks are not perfectly synchronized with each other and will drift in and out of phase. This phase drift could cause missed samples because no new data was transmitted to the datalogger in time for the next scan. The clock drift between a CR800-series or CR1000 running at 4 Hz and the WindSonic running at 4 Hz will account for a loss of about 0.07% of the data. For the CR3000, this loss is about 0.014%. In the example programs, the SerialInRecord () instruction loads NaN to the wind and diagnostic variables if there was no new data. The NaN is not used in the online statistics. This error will occur if the WindSonic is disconnected from the serial port, the WindSonic has no power, or the datalogger and WindSonic clocks have drifted out of phase by one cycle. NOTE To avoid apparent data loss due to clock asynchronicity between the datalogger and WindSonic, run the datalogger at a rate slower than 4 Hz. The example programs run at 2 Hz (500 msec). Early versions of the CRBasic datalogger Operating System (OS) did not support RS-232 communication using control ports, even though the hardware was available, or the instruction SerialInRecord (). It may be necessary to update the CRBasic datalogger OS. Table 3 lists the OS versions that support both serial communications using control ports and the SerialInRecord (). The most current datalogger operating systems are available on the Campbell Scientific web site in the Support Downloads section. TABLE 3. CRBasic Datalogger Operating Systems that Support RS-232 Communications and SerialInRecord (). Datalogger Model CR800-series CR1000 CR3000 Operating System 4.0 or later 13.0 or later 6.0 or later 5.1 Single WindSonic1 on a CRBasic Datalogger TABLE 4. Wiring for Program Example 1 Description Color CR1000 WindSonic RxD Green COM1 Tx (C1) WindSonic TxD White COM1 Rx (C2) Power Red +12 Vdc RS-232/Power reference Black G Shield Clear G 5

15 When the datalogger issues the aro! command, the WindSonic immediately begins transmitting the most current wind measurements to the datalogger. After receiving the aro! command, it takes the WindSonic approximately 190 milliseconds ±10 milliseconds to transmit the data. If the ado! command is used, it will take slightly longer to retrieve the data because of the additional handshaking required with the ado! command. For all practical purposes a datalogger can measure up to 4 WindSonic4s at 1 Hz. Table 7 lists the datalogger OS version and revision that supports the SDI-12 aro! command. The most current datalogger operating systems are available at the Campbell Scientific web site in the Support Downloads section. TABLE 7. Datalogger Operating Systems that Support the SDI-12 aro! Command. Datalogger Model CR510 CR510-PB CR510-TD CR10X CR10X-PB CR10X-TD CR23X CR23X-PB CR23X-TD CR200-series CR800-series CR1000 CR3000 CR5000 Operating System 1.13 or later 1.6 or later 1.13 or later 1.20 or later 1.6 or later 1.12 or later 1.17 or later 1.6 or later 1.12 or later 3.0a or later 1.0 or later 1.0 or later 1.0 or later 1.8 or later 6.1 Single WindSonic4 on an EDLOG Datalogger TABLE 8. Wiring for Program Example 3 Description Color CR10X SDI-12 data Green C8 SDI-12 power Red +12 Vdc SDI-12 reference Black G Shield Clear G 11

29 7. Changing the SDI-12 Address Using LoggerNet and a Datalogger Up to ten WindSonic4s or other SDI-12 sensors can be connected to a single datalogger control port. For all practical purposes a datalogger can measure up to 4 WindSonic4 at 1 Hz. Each SDI-12 device must have a unique SDI-12 address between 0 and 9. The factory-set SDI-12 address for the WindSonic4 is 0. The WindSonic4 SDI-12 address is changed in software by issuing the aab! command, where a is the current address and b is the new address, to the WindSonic4 over the SDI-12 interface. The current address can be found by issuing the?! command. A computer running LoggerNet can be used to issue any valid SDI-12 command through the datalogger to the WindSonic4. For a complete list of SDI-12 commands supported by the WindSonic4, see Section 11 of the Gill WindSonic manual. 7.1 Array-Based EDLOG Dataloggers Connect a single WindSonic4 to the datalogger using Control Port p as described in Section 4.2, and download a datalogger program that contains the SDI-12 Recorder (Instruction 105) instruction with valid entries for each parameter. In the LoggerNet Toolbar, navigate to and activate the Test Terminal Emulator menu. The Terminal Emulator window will open. In the Select Device menu, located in the lower left hand side of the window, select the station. Click on the Open Terminal button. If communications between the datalogger and PC are successful, the red bar located in the upper left hand side of the window, will turn green. Click inside the Terminal Emulator window and press the <enter> key until the datalogger responds with the prompt (Figure 2). To activate the SDI-12 Transparent Mode, on Control Port p, enter px and press the <enter> key. The datalogger will respond with entering SDI- 12. If any invalid SDI-12 command is issued, the datalogger will exit the SDI-12 Transparent Mode. To query the WindSonic4 for its current SDI-12 address, enter the command?!. The WindSonic4 will respond with the current SDI-12 address. To change the SDI-12 address, enter the command aab! ; where a is the current address from the above step and b is the new address. The WindSonic4 will change its address and the datalogger will exit the SDI- 12 Transparent Mode. To activate the SDI-12 Transparent Mode on Control Port p, enter px and press the <enter> key. Verify the new SDI-12 address by entering the?! command. The WindSonic4 will respond with the new address. 25

30 To exit the SDI-12 Transparent Mode, enter. FIGURE 2. Screen Capture of the SDI-12 Transparent Mode on an EDLOG Array-Based Datalogger (CR10X) using Control Port 8 and Changing the SDI-12 Address from 0 to Table-Based EDLOG Dataloggers Connect a single WindSonic4 to the datalogger Control Port p as described in Section 4, and download a datalogger program that contains the SDI-12 Recorder (Instruction 105) instruction with valid entries for each parameter. In the LoggerNet Toolbar, navigate to and activate the Test Terminal Emulator menu. The Terminal Emulator window will open. In the Select Device menu, located in the lower left hand side of the window, select the station. Click on the Open Terminal button. If communications between the datalogger and PC are successful, the red bar located in the upper left hand side of the window, will turn green. Click inside the Terminal Emulator window and press the <enter> key until the TD datalogger responds with the > prompt (Figure 3). To activate the SDI-12 Transparent Mode, press the <enter> key a few times. The datalogger will respond with a > prompt. Enter *# and wait for a datalogger response. It will respond with a F0000 prompt. Finally, 26

31 enter p (Control Port p) and press the <enter> key. The TD datalogger will respond with entering SDI-12. To query the WindSonic for its current SDI-12 address, enter the command?!. The WindSonic4 will respond with the current SDI-12 address. To change the SDI-12 address, enter the command aab! ; where a is the current address from the above step and b is the new address. The WindSonic4 will change its address and the datalogger will exit the SDI- 12 Transparent Mode. To activate the SDI-12 Transparent Mode again and check the address change, enter #8 and press the <enter> key. The TD datalogger will respond with entering SDI-12. Verify the new SDI-12 address by entering the?! command. The WindSonic4 will respond with the new address. To exit the SDI-12 Transparent Mode, type in or press the <enter> key. FIGURE 3. Screen Capture of the SDI-12 Transparent Mode on an EDLOG Table-Based Datalogger using Control Port 8 and Changing the SDI-12 Address from 0 to 1 27

32 7.3 CR200-series Datalogger Connect a single WindSonic4 to the datalogger using Control Port C1/SDI12 as described in Section 4, and download a datalogger program that does not contain the SDI12Recorder () instruction. In the LoggerNet Toolbar, navigate to and activate the Test Terminal Emulator menu. The Terminal Emulator window will open. In the Select Device menu, located in the lower left hand side of the window, select the station. Click on the Open Terminal button. If communications between the datalogger and PC are successful, the red bar located in the upper left hand side of the window, will turn green. Press the <enter> key until the datalogger responds with the CR200> prompt (Figure 4). To query the WindSonic4 for its current SDI-12 address, press the <enter> key, at the CR200> prompt enter the command SDI12>?!, and press the <enter> key. The WindSonic4 will respond with the current SDI-12 address. To change the SDI-12 address, press the <enter> key, at the CR200> prompt enter the command SDI12>aAb! ; where a is the current address from the above step and b is the new address. The WindSonic4 will change its address and the datalogger will exit the SDI-12 Transparent Mode and respond with Fail. Verify the new SDI-12 address. Press the <enter> key, at the CR200> prompt enter the command SDI12>?! and press the <enter> key. The WindSonic4 will respond with the new address. 28

33 FIGURE 4. Screen Capture of the SDI-12 Transparent Mode on a CRBasic CR200-series Datalogger using Control Port C1/SDI12 and Changing the SDI-12 Address from 0 to 1 8. Maintenance There are no user-serviceable parts on the WindSonic. Keep the transducer paths clear of any obstructions. When clearing the transducer paths, do not remove or damage the transducer matching layer. The transducers can be gently cleaned with a cloth and mild detergent. Do not use solvents and avoid scratching or damaging the matching layers. The transducer s matching layers are the rubber caps on each of the transducers. Should the WindSonic be damaged, fails to output data, or sends a nonzero diagnostic, contact Campbell Scientific, Inc. for an RMA number before returning it for repair. For more information, see Section 12 Maintenance and Fault-Finding in the manual published by Gill Instruments. 9. Diagnostic Codes The WindSonic outputs a diagnostic (Table 13) along with each wind direction and speed measurement. The example datalogger programs filter all data when the diagnostic is not 0. If the WindSonic is not powered, not connected, is using the wrong COM port/sdi-12 address, or has missed a sample, the example programs will load NaN or for wind direction and speed, and the diagnostic (Table 14). The programs also report the number of good samples that were used in computing the on-line statistics. If the total number of good samples is less than 98% of the expected samples, the WindSonic may be in need of repair. 29

35 Appendix A. WindSonic Orientation A.1 Determining True North and Sensor Orientation The orientation of the WindSonic North Arrow Markers is found by reading a magnetic compass and applying the site-specific correction for magnetic declination; where the magnetic declination is the number of degrees between True North and Magnetic North. Magnetic declination for a specific site can be obtained from a USGS map, local airport, or through a NOAA web calculator (Section A.2). A general map showing magnetic declination for the Conterminous United States in 2004 is shown in Figure A-1. FIGURE A-1. Magnetic Declination for the Conterminous United States (2004) A-1

36 Appendix A. WindSonic Orientation Declination angles are always subtracted from the compass reading to find True North. A declination angle East of True North is reported as a positive value and is subtracted from 360 (0) degrees to find True North as shown Figure A-2. A declination angle West of True North is reported as a negative value and is also subtracted from 0 (360) degrees to find True North as shown in Figure A-3. Note that when a negative number is subtracted from a positive number, the resulting arithmetic operation is addition. For example, the declination for Longmont, CO (10 June 2006) is 9.67, thus True North is , or as read on a compass. Likewise, the declination for McHenry, IL (10 June 2006) is -2.68, and True North is 0 - (-2.68 ), or 2.68 as read on a compass. FIGURE A-2. A Declination Angle East of True North (Positive) is Subtracted from 360 (0) degrees to Find True North FIGURE A-3. A Declination Angle West of True North (Negative) is Subtracted from 0 (360) degrees to Find True North A-2

37 Appendix A. WindSonic Orientation A.2 Online Magnetic Declination Calculator The magnetic declination calculator web calculator published by NOAA s Geophysical Data Center is available at the following url After the web page loads, enter the site zip code, or longitude and latitude, then click on the Compute Declination button (Figure A-4). FIGURE A-4. Online Magnetic Declination Calculator with Inputs and Output for Longmont, CO. The declination for Longmont, CO is 9.67 degrees (10 June 2006). As shown in Figure A-4, the declination for Colorado is positive (east of north), so true north for this site is , or degrees. The annual change is -8 minutes/year or 8 minutes west per year. A-3

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